Boot and shoe jack



R. S. WILSON. B001 AND Sues JACK. FILED MAR. 31. 1921,

- INVENTOR.

A TTORNE Y.

Patented Jan. 16, 1923.

BOOT AND SHOE JACK.

Application filed March 31, 1921.

To all whom may concern Be it known that I, RAYMOND S. Wilson, a citizen of the United States, and a resis dent of Philadelphia, in. the county of Philadelphia and State of Pennsylvania, have invented an Improvement in Boot and Shoe Jacks, of which the following is a specification.

My invention relates to jacks adapted for use by shoemakers in the manufacture or repair of shoes and ithas for its object generally to provide an improvement in the connection between the last-carrying or supporting arm and the pedestal or other support therefor.

A further object is to provide means whereby the said arm is free tobe adjusted at will to positions desired and yet at the same time is held against accidental movement. These adjustments may be effected without releasing any of the parts by means of which the arm and the pedestal or base are pivotally connected together.

A further object is to provide means whereby the tightness with which the said arm is held against the supporting base or pedestal may be increased or diminished as may be desired.

A still further object of my invention is to provide means whereby the said arm is adapted to be oscillated or tilted in a single plane and is also rotatable about its longitudinal axis.

Other objects and advantages of my invention will be pointed out in the detailed description thereof which follows or will be apparent from such description.

In order that my invention may be more readily understood and its practical advantages fully appreciated, reference may be had to the accompanying drawing in which Fig. 1 is a view partly in side elevation and partly in central vertical section;

Fig. 2 is a similar view with the lastsupporting arm in tilted position;

Fig. 3 is a bottom plan view of the device;

Fig. 4: is a side elevation of a modified construction of supporting base for the lastsupporting arm; and

Fig. 5 is a top plan view of the same.

Referring to Figs. 1 to 3 inclusive of the drawing, 1 designates a hollow pedestal or base of truncated cone-shape having a Serial N0. 457,320.

lateral flange 2 at its lower end which is adapted to rest upon and be secured to any suitable support, such as a table or workbench. The pedestal is provided with a semi-spherical web portion constituting a socket 3 which is situated below the plane of the top thereof, the upper circular edge of said socket terminating in the plane of the said top. The bottom of said socket is provided with a slot 4 which terminates in cylindrical ends the radius of curvature of the inner end being in a vertical line. through. the cent-er of the sphere of which the semi-spherical socket is a part.

The last 8 is adapted to be supported on the last-supporting arm 10 which is provided with a semi-spherical head 11 at its lower end which is seated in and fits the socket 3. The said head is provided with a cylindrical projection 12 which is screw threaded at its outer end, as shown at 13, for the reception of a nut 14 against which the outer lower end of the spring 15 is seated. The said spring is coiled around the projection 12 and its inner upper end is seatedagainst a washer 16, which is in contact with the under side of the socket 3. In the construction shown, the projection 12 consists of a headed bolt around the headed end of which the head 11 of the arm 10 is cast. The longitudinal. axis of the projection 12 is situated at the center of the semi-spherical surface of the head 11 and its longitudinal axis is in alinement with one of the radii of the said head, so that when the said projection is situated against the inner end of the slot 4 the arm 10 will occupy a vertical position, as shown in Fig. 1.

The arm 11 may be tilted and adjusted to any position within the limits of the length of the slot 4, such tilting adjustments being in the plane of the said slot. The friction between the concave and convex surfaces of the socket 3 and the head 11 is sufficient to hold the said head and the arm integral therewith in any position to which they may be adjusted, while a boot or shoe on the last 8 is being operated upon. By tightening or loosening the nut 14: the tension of the spring 15 may be increased or diminished to increase or diminish the force of the pressure of the head 11 against the concave surface of the socket 3. The fric tion between the contacting surfaces of these two parts is thus varied and regulated as may be desired.

In addition to the tilting movement of the arm 10, its head 11 and the projection 12 fixedly imbedded in the latter, these parts may be rotated about the longitudinal axis thereof.

It will be apparent that by reason of the tilting and rotating adjustments of which the arm is capable the person using the same can adjust it so as to bring the boot or shoe upon the last 8 into convenient position to be operated upon.

The arm 10 is provided with the usual slot through which a strap, not shown, adapted to extend, which is employed to hold the boot or shoe upon the last.

In Figs. 4 and 5 I have shown a base or support for the arm 10 which is adapted to be extended across and be supported upon the portions of the legs above the knees of a person using'the jack. The said base or support is oblong or rectangular in shape and the opposite end portions thereof, on opposite sides of the semi-spherical socket 26, are curved so as to provide eoncaved under sides which are adapted to rest upon the legs. For the purpose of strengthening the base, as well as for the purpose of producing a more ornamental or pleasing structure, I have provided the flanges 2'? at the central portion of the opposite sides of the said base. I- have also provided the strengthening gussets 28 situated in the angles between the opposite end portions ot the base or support-and the upper portion of the socket 26.

The said socket 26 is provided with a slot 29, like that shown in Figs. 1 to 3 inclusive, which extends diagonally with respect to the length of the said base, so that when the jack is supported upon the lap the tilting movements of the arm 10 are in a direction with respect to the body of the operator to place the boot or shoe upon the last 8 in convenient position for the operator to work upon the same.

In case it should be desired to support the base or support shown in Figs. at and 5 upon supports, such as posts, I have provided the holes in the opposite end portions thereof through which means may be passed for fastening the said base to such supports.

It will be understood that my invention is tion of a supporting base having a semispherical socket in its upper side, said socket having aslot extending therethrough, a lastsupporting arm the lower end of which terminates in a semi-spherical head which fits said socket, said head having a projection which extends through said slot, a coiled spring surrounding said projection and adjustable means upon the outer end of said project-ion for holding the inner end oi said spring against the said socket.

2. In a boot and shoe jack, the combina tion of a supporting base having a semispherical socket, said socket being provided with a slot, the inner portion of which is in alinement with the vertical radius of saidi'80 socket, a last-supporting jack, the lower end of which terminates in a semi-spherical head which fits the said socket, and the said head being provided with a projection which extends through said slot, the said projection being situated at the center of the exterior of the said head wherebywhen it is situated against the inner end of said slot the said arm will occupy a vertical position with respect to the said base, and a spring upon said projection for yieldingly securing the said head in said socket.

In testimony that I claim the foregoing as my invention, I have hereunto subscribed my name this 21st day of March, A. D. 1921.

RAYMOND S. IVILSON. 

